Problem with NJM2591 IF Demodulator
时间：04-06
整理：3721RD
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Hi all,
I used the IC NJM2591, and there are some questions confused me. I measured the audio output level, and I found out my result was only 150mV (offset). Does anyone know the audio output level is fixed or could be changed? I wanna my output level to be around 900mV. Also the audio output pin came with the low pass filter, which I used were 47K and 220pF. Would they also affect the audio output level?
I used the IC NJM2591, and there are some questions confused me. I measured the audio output level, and I found out my result was only 150mV (offset). Does anyone know the audio output level is fixed or could be changed? I wanna my output level to be around 900mV. Also the audio output pin came with the low pass filter, which I used were 47K and 220pF. Would they also affect the audio output level?
JRC specify clearly in the datasheet that the audio output is 100mV nominal (max 130mV).
Let the filter as it is and just place one audio transistor after, to boost the audio level to 1V.